Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50  Triode  1937    CV2533 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron  1948  
 GL502A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Nixie Tube   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
506BU  Rectifier FW  1930    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50A5  Beam Tetrode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1946  
 A4388 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50BM8  Triode Pentode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1951  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50CG  Photocell     3554 4GSM 50CG 868 CE1 CMG32 G8 GS146 NU.1 PJ23 R59A WL735 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50L6  Beam Tetrode  1941    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1941    CV2534 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1941  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50Y6GT  Rectifier FW  1940    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50Z7G  Rectifier FW  1940    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Tetrode  1936    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
517  Rectifier MV     5557 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
527  Triode  1944    3300G4 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
52CG  Photocell     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1949  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
53  Double Triode (Class B)  1936    CV2535 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
53A  Double Triode     350D4 CV2536 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Photocell     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1958  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
54KU  Rectifier FW     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5458  Voltage Stabiliser     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5459  Voltage Stabiliser     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Diode Triode  1936  
 CV2537 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5544  Thyratron     CV2210 MT5544+D3828 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron  1958  
 CV2215 GL5545 MT5545 XR16400 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5550  Ignitron     BK66/5550 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5551A  Ignitron     BK42/5551A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Voltage Stabiliser   
 CV2573 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5552A  Ignitron     BK24/5552A CV2124 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5553B  Ignitron     BK146/5553B 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5554  Ignitron     BK44/5554 CV1742 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5555  Ignitron     BK46/5555 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode     GL5556/PJ8 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5557  Thyratron (Mercury Vapour)     MT17 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5559  Thyratron (Mercury Vapour)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5560/FG95  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586  Magnetron (Sband Pulse)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586A  Magnetron (Sband Pulse)     M5083 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850  Camera Tube (Videcon)     7038 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850F  Camera Tube (Videcon)     P844 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850N  Camera Tube (Videcon)     P849 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850S  Camera Tube (Videcon)     8541A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586  Magnetron (Sband Pulse)     CV3611 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875  Camera Tubes (Leddicon)     P8000 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Camera Tubes (Leddicon)     P8000B 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875G  Camera Tubes (Leddicon)     P8000G 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875L  Camera Tubes (Leddicon)     P8000R 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Camera Tube     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55A/165M  Double Pentode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55B/200A  Tetrode (Power)     C1134 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55B/400A  Tetrode (Power)     C178A/5894 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55CG  Photocell     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode  1932  
 256 A256 C56 CV611 ER56 G56 PH256 PH56 VT56 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Diode  1960  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5625  Tetrode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5632/C3J  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW  1953  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5644  Voltage Stabiliser     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Voltage Reference Tube  1948  
 QS1209/5651 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5651WA  Voltage Reference Tube  1948    QS1212 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1954  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Image Orthicon  1949  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Beam Tetrode  1957  
 CK5656 CV2970 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5657  Magnetron (Sband Pulse)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1952  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1952  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5671  Triode (Power)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode  1954  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5675A  Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5676  Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5684/C3JA  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5685/C6JA  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1952  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1956  
 5687WA 5687WB CK5687 CV2578 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5687WA  Double Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5691  Double Triode     CV3705 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1948  
 CV3699 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5696  Thyratron     CV3512 EN92 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57  Pentode  1936    CV612 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57.  Thyratron (Mercury Vapour)     BT5 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5702  Pentode     CV3895 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5702WA  Pentode     CV5057 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode  1957  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5719  Triode     CV4008 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5720  Thyratron (Mercury Vapour)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Noise Diode  1955    SD1033 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5725  Pentode  1950    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Diode  1952  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5727  Thyratron     CV4018 M8204 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5728  Thyratron (Mercury Vapour)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 MechanoElectronic Transducer  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode  1961  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5731  Triode     E1C 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode Transducer  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5744  Triode     CV163 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5744WA  Triode     CV163 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5749  Pentode  1951    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Heptode  1951  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
575A  Rectifier MV     AH2511 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1953  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
575A  Rectifier HW     ESU400 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762  Triode (Power)     ACT30 BR191B CV2383 TY65000A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762/7C24  Triode (Power)     CV2383 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762A  Triode (Power)     CV2383 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1949  
 6062 6062 A4541H BR1130 CV2129 M8096 QE0310 QE0312 QV0312 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier HW   
 577WA CV3969 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5783  Voltage Stabiliser     CV3933 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5783WA  Voltage Stabiliser     CV3960 CV4066 M8190 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5784  Pentode     CV3896 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5784WA  Pentode     CV5058 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5796  Thyratron     CV3706 XR11600 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57CV  Photocell  1950    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1936  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5814  Double Triode     CV4016 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1954  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5814WA  Double Triode     CV4032 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Camera Tube (Image Orthicon)  1957  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A  Camera Tube (Image Orthicon)     5820A/E 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A/E  Camera Tube (Image Orthicon)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A/L  Camera Tube (Image Orthicon)     5820A/E 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5822A  Ignitron     BK168/5822A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5829  Double Diode     CV3898 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5829WA  Double Diode     CV5059 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5830  Thyratron (Mercury Vapour)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1957  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5842  Triode     CV3789 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5852  Rectifier FW     CV3943 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5861  Triode     ME1001 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5866  Triode     TY2125 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5867  Triode     CV1350+D2168 TY3250 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5868  Triode     TY4500 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5869/AGR9950  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5870/AGR9951  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5876  Triode  1964    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode  1964  
 5876 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1954  
 6L6WGB 6L6WGC 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Beam Tetrode  1955  
 5894B AX9903 CV424 QQV0640 RS1009 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894/C178A  Double Beam Tetrode  1955    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894A  Double Beam Tetrode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894B  Double Beam Tetrode  1958    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5895  Double Beam Tetrode     QQZ0415 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1958  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode  1936  
 CV2538 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode     CV4029 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5906  Pentode     CV3931 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5923  Triode (Power)     BW1165 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5924  Triode (Power)     BW1165 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1952  
 6L6WGA CV3899 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5948  Thyratron (Hydrogen)     CX1140 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5948A  Thyratron (Hydrogen)     CX1140 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron (Hydrogen)   
 FX2519A/5949A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5949A  Thyratron (Hydrogen)     FX2519A/5949A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Camera Tube  1947    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5956  Thyratron (Hydrogen)     FX2517 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron (Hydrogen)   
 FX2517 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5958/E40  Thyratron (Hydrogen)     FX2513 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5958/E41  Thyratron (Hydrogen)     FX2513 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1954  
 CV3900 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Double Triode  1954  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5977  Triode     CV3932 
